Reamer



J. KEMNA.

REAMER.

APPLICATION FlLED MAR. 24.. 1919.

1,86%3295, Patented Bec. .14, 192m f T (dl whom it may concem riin 10 oxtends fion] one end of gtl1e sleeve 8 JOSEPH KEMN, OF ONTARIO, CALLIFOB\IAJ BEAMER.

Specification of Letters Patent. latented Dec. 314, 1924).

Application fi1ed March 24:, 1919. Serial Nc( 284,786.

Be it known that I, J osnm1 KEMNA, a citizen 01 th United States, residing at 0ntario, in the county of San Bernardino and State of California, have invented new and nseiul Improvements'in Reamers, of which the following is a specification.

The objects of my inventionare to pro- V vide a reamer adptedto be adjnstable in 10 the limit of depth to which it may out and a novol means for holding the depth.gage in position. 1

Figure 1 is a side elevationof a reamor embodying the principles of my invention. Fig. 2 is an end olevation looking in the direction indicatod by the arrows 2 in Figs.

1 and Fig. 3 is a diametrical seotional detail on the lines 3--3 of Figs. 1 and 2.

Fig. 1} s a cross section on the fines 44= oi Figs. 1 and 3.

A straight round shank 1 has a diamet1i cal pin l1ole 2 somo distance from its endiavo 3. 11 cutter body 4 has a Straight smooth bore 5 in wlxich the shank 1 i'onns a sliding lit. 'lhe upper end of the body 1 has oxte1nal svrvw tlneads 6 and the lower end has longitndinally extending cutting edges 7. A sloeve 8 has internal screw tl1londs E) fitting the threads 6. An annnlar loosely around tlie cutting edges 7. Diametrically opposed slots 11 and 12 are formed through the sleeve 8 from the end.

opposite iho rim 10, and a second pair of diamezrically opposed s'iots 13 and 14 are formed throngh the sleeve 8 at right angles to the slots 11 and 12. An and face 15 of the rim 10 is adjustable relative to the face 16 of the body 4:. A pin 17 is removably inserted through a pair of the slots 11 and 12, or 13 and 14, and through the pin hole 2, thore being a diametrical pin bols 18 through the body 4 to receive the pin; The pin 17 holds the body 4 carrying the cutting odges 7 upon the shank 1, and when it is dosired to adjust the reamer 150 out to a certain depth from the end 16, thepin 17 is 1exnoved and the sleove 8 screwed up or down to move tl1e aq 15 to the desired point, then the pm is inserted and the reamer operated, and the face 15 forms a stop to limit the depth to which the reamer will go.

Thus I have prodnced a reamer formed in two pieces, 'one piece being serewed upon the othei, and there being means for holding the parts in their adjnstable positions.

Various changes may be made without departing from the spirit of my invention as claimed.

I claim:

1.' A reamer comprising a cutter memoer having cntting edges on its lower and and a pin hole through its upper end, and having a central bore, external screw threads npon the upper portion of the saidpnttor, a driving shank adapted to, the central bore of the body and having a pin hole corresponding to the pin hole in tlie body, a stop sleeve, seated upon the screw threads of the body and having an end face orming a depth stop and having slots in its npper end adapted to engage a holding pin, and a driving and locking pin passing throngh ch siots of the sieove and the pin holes in the body and in the shank.

2. A reainer comprising, in oombination, a cutter n1ember having a threadod oni:er surface, a stop sleevomountod on the member and adjnstable along the threads thereon, a diivingstn insoitible' in the cutter member, and means for locking the said parts and for holding the sleeve in given position on the n1ember.

A. reamer comprising in Combination, a c1itter member having a threaded enter surface, a stop sloeve monnted on the member and adjnstablo along the threads thereon, a driving stem insortible in the cutter member, and means for iocking the said parts and for holding the sleove in given position on the member, said means including a pin, the sleeve slotced longitudinally to receive the pin.

In testimon whereoiI have signed my name to this specification.

JOSEPH KEMNA. 

